Heat shielded press

ABSTRACT

A MOLDING PRESS HAVING FIRST AND SECOND ELEMENTS RELATIVELY MOVABLE TOWARD AND AWAY FROM EACH OTHER TO ENCLOSE AN ARTICLE TO BE MOLDED. EACH OF SAID ELEMENTS BEING PROVIDED WITH COOPERATING HEAT SHIELD MEANS TO PREVENT LOSS OF HEAT DURING THE OPENING AND CLOSING AND OPERATION OF THE PRESS.

Jan. 5, .1971" M MORSE n v 3,551,952

HEAT SHIELDED PRESS Filed Dec. 8, 1967 United States Patent O 3,551,952HEAT SHIELDED PRESS Milton Morse, Fort Lee, N.Y. (41 Honeck St.,Englewood, NJ. 07631) Filed Dec. 8, 1967, Ser. No. 689,040 Int. Cl. B29h5/22 U.S. Cl. 18-17 1 Claim ABSTRACT OF THE DISCLOSURE A molding presshaving rst and second elements relatively movable toward and away fromeach other to enclose an article to be molded. Each of said elementsbeing provided with cooperating heat shield means to prevent loss ofheat during the opening and closing and operation of the press.

This invention relates generally to the field of heated or cryogenicmolding presses, and more particularly to an improved form thereofhaving heat shielding means for at least partially preventing theexchange of heat between the molding area and the surrounding atmosphereduring operation.

It is among the principal objects of the present invention to provide aheat shielded molding press capable of maintaining a relatively constanttemperature, not only across the faces of the upper and lower platens,but also within a confined area between the platens.

Another object of the invention lies in the provision of an improvedmolding press possessed of the above advantage which permits the pressoperator to work in an ambient temperature which is considerably reducedor modified from that of prior art devices, thereby permitting him tofunction more efficiently.

Another object of the invention lies in the provision of an improvedheat shielded press, possessed of the above advantages, in which thecost of fabrication may be of a reasonably low order, directlycomparable with existing prior art devices, thereby permittingconsequent wide sale, distribution and use.

A further object of the invention lies in the provision of a heatedmolding press, which owing to heat shielding construction may beoperated at considerably lower cost than conventional devices.

A feature of the disclosed embodiment lies in the provision of a slidingsealing means which maintains an effective seal irrespective of therelative positions of the platens comprising the device.

These objects and features, as well as other incidental ends andadvantages, will more fully appear in the progress of the followingdisclosure, and be pointed out in the appended claim.

In the drawing, to which reference will be made in the specification,similar reference characters have been employed to designatecorresponding parts in the several views.

FIG. 1 is a schematic view of an embodiment of the invention, showingthe device in relatively opened condition.

3,551,952 Patented Jan. 5, 1971 l CCY FIG. Z is a similar schematic viewshowing the device in fully closed condition.

In accordance with the invention, the device, generally indicated byreference character 10, comprises broadly: a frame element 11, a fixedor upper plate 12, a relatively movable or ram plate 13, an upper heatshield element 14, a lower heat shield element 15, an upper heaterelement -16 and a lower heater element 17.

The frame element 11 may be of any convenient type, such as thatillutrated in the drawings and including a pair of vertical supportwalls 19 and 20, the upper ends 21 of which are modified to providethreaded means 22 engaged in openings 23 in the fixed plate 12, to bemaintained therein by nut means 24.

The fixed plate 12 is horizontally positioned between the walls '19 and20, and includes an outer surface 26 and an inner surface 2.7 whichmounts the upper heat shield element 14. The movable plate 13 includes alower surface 30 and an upper surface 31 supporting the lower heatshield element 15. Guide means 32 cooperates with the walls 19 and 20 topermit the plate 13y to be moved upwardly and downwardly relative to thefixed plate 112 under the action of hydraulic or other lifting means(not shown).

The upper heat shield element 14 includes a main body of insulativematerial 35 of generally rectangular configuration and bounded by sidewalls 36. A lower wall 37 supports the upper heater element 16 which maybe of any desired type well known in the art. Surrounding the side walls36 is an insulative upper end wall 38 forming a recess with a peripheralwall 39. The wall 39 is bounded by an inner surface 40, and an outersurface 41 as well as a lower edge 42.

The lower heat shield element 15 is generally similar, including a mainbody of insulative material 45, an insulative lower wall 46, as well asa peripheral wall 47 bounded by an inner surface 48, an outer surface 49and an upper edge 50. Attached to the outer surface 49 at t-he edge 50thereof is a resilient wiper 51 which forms a sliding seal with theinner surface 40 of the wall 39. Extending through the peripheral wall47 along one side thereof is a selectively openable door opening 52which is uncovered when the device is in the position shown in FIG. 1,and may be opened to permit insertion and withdrawal of molds.

During operation, the door opening is opened for each molding cycle,subsequently closed, and the press moved to closed position, in whichposition the opening is completely covered. Heat loss is conned to thatperiod in which the opening is uncovered, and only one area on theperipheral of the press is thus exposed to emanating heat, therebymaterially increasing the comfort of the operator.

I wish it to be understood that I do not consider the invention limitedto the precise details of structure shown and set forth in thisspecification, for obvious modifications will occur to those skilled inthe art to which the invention pertains.

|I claim:

1. A heat shielded molding press comprising: a first relatively fixedplate, a second plate movable toward and away from said first plate toclose and open said press, heating means associated with at least one ofsaid first and second plates, rst and second heat-sealing means on eachof said rst and second plates, respectively, positioned in adjustablepartially overlapping relation, and means effecting a sliding sealbetween said first and second heat-sealing means; there being a dooropening in the inner of said overlapped first and second elements whichis uncovered when said press is in open position, and closed when saidpress is in closed position, whereby loss of heat Within said rst andsecond heat-sealing References Cited UNITED STATES PATENTS 3/ 1916Williams. 3/1959 Frieder et al.

means is limited to that period in which the door opening 10 18-6 isopened and in the area of said door opening.

